| APA | UDHD. (2012, February 16). In Acronym Geek. Retrieved 20:45, February 16, 2012, from http://www.acronymgeek.com/UDHD |
| MLA | "UDHD." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/UDHD>. |
| MHRA | 'UDHD', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/UDHD> [accessed 16 February 2012] |
| Chicago | "UDHD", http://www.acronymgeek.com/UDHD (accessed February 16, 2012). |
| CBE/CSE | UDHD [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/UDHD. |
| Bluebook | UDHD, http://www.acronymgeek.com/UDHD (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UDHD, http://www.acronymgeek.com/UDHD (optional description here) (as of Feb. 16, 2012, 20:45). |
| AMA | UDHD. Acronym Geek. February 16, 2012, 20:45. Available at: http://www.acronymgeek.com/UDHD. Accessed February 16, 2012, 20:45. |